package com.zsqat.eshop.seckill.scheduled;

import com.zsqat.eshop.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * 秒杀商品定时上架
 *  每天晚上3点，上架最近三天需要三天秒杀的商品
 *  当天00:00:00 - 23:59:59
 *  明天00:00:00 - 23:59:59
 *  后天00:00:00 - 23:59:59
 */

@Slf4j
@Service
public class SeckillScheduled {

  @Autowired
  private SeckillService seckillService;

  @Autowired
  private RedissonClient redissonClient;

  // 秒杀商品上架功能的锁
  private final String upload_lock = "seckill:upload:lock";

  // TODO 保证幂等性问题
  // @Scheduled(cron = "*/5 * * * * ? ")
  @Scheduled(cron = "0 0 1/1 * * ? ")
  public void uploadSeckillSkuLatest3Days() {
    //1、重复上架无需处理
    log.info("上架秒杀的商品...");

    //分布式锁
    RLock lock = redissonClient.getLock(upload_lock);
    try {
      //加锁
      lock.lock(10, TimeUnit.SECONDS);
      seckillService.uploadSeckillSkuLatest3Days();
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      lock.unlock();
    }
  }
}
